Windsor, California: water and wastewater capital improvement projects
20 line items · $163M · starting 2026–2027 · 1 plan
Windsor's published capital plans list 20 water, sewer and wastewater line items with a combined planning budget of $163M, of which 12 items worth $145M sit in the wastewater and sewer departments. The largest single item is Secondary Treatment System Upgrades at $57M (2023–2027). The ten largest items are listed below; the full list with descriptions and page references is in Klarifi.
A capital improvement plan (CIP) is a city’s multi-year budget for building and replacing infrastructure. The water, sewer and wastewater sections list each project with its budget and the years it is funded, which makes them the earliest public signal that a plant, pump station or pipe network is about to be upgraded, usually two to four years before a contract is awarded.
The largest water and sewer projects in Windsor
| # | Project | Department | Type | Budget | Years |
|---|---|---|---|---|---|
| 1 | Secondary Treatment System Upgrades | Wastewater | Aeration and blowers | $57M | 2023–2027 |
| 2 | Biosolids Handling Facility | Wastewater | Biosolids, sludge and dewatering | $56M | 2023–2027 |
| 3 | Off-River Groundwater Wells | Water Supply | Wells and groundwater | $7M | 2023–2025 |
| 4 | AWT Filter Replacements | Wastewater | Membranes and filtration | $7M | 2025–2028 |
| 5 | Emergency Generators at the Water Reclamation Facility | Wastewater | Wastewater treatment plant upgrades | $6M | 2025–2027 |
| 6 | SS-1 Windsor River Road to Water Reclamation Facility | Wastewater | Wastewater treatment plant upgrades | $6M | 2024–2026 |
| 7 | New WRF Building | Wastewater | Wastewater treatment plant upgrades | $4M | 2023–2026 |
| 8 | SS-2 Starr Road | Wastewater | Sewer rehabilitation and I&I | $4M | 2026–2028 |
| 9 | Esposti Park Well Treatment System | Water Supply | Wells and groundwater | $4M | 2026–2028 |
| 10 | Main Switchboard Replacement at Water Reclamation Facility | Wastewater | Wastewater treatment plant upgrades | $3M | 2025–2026 |
10 more line items in Windsor, with descriptions and contacts
Klarifi holds every Windsor line item with its description, the page it appears on and the source document, plus 2 verified contacts at the city’s treatment plants. Track new plans as they are adopted and compare with similar projects in other cities.
Planned spend by start year
Before 2026
$151M
13 items
2026
$10M
4 items
2027
$2M
3 items
By department
| Department | Line items | Budget | Share |
|---|---|---|---|
| Wastewater | 12 | $145M | 89% |
| Water Supply | 4 | $14M | 8% |
| Water Distribution | 4 | $5M | 3% |
Project types in Windsor's plan
Wastewater treatment plants in Windsor
2 publicly owned treatment plants in Windsor with 14 permit violations in the last three years. Each profile shows flow, permit, technology and compliance data.
| Plant | Avg flow (MGD) | NPDES | Violations (3y) |
|---|---|---|---|
| Lytton Wastewater Treatment Plant And Collection System | — | CA0000437 | 0 |
| Town Of Windsor Wastewater Treatment Plant | — | CA0023345 | 14 |
Other California cities with capital plans
Windsor capital plan questions
Sources and methodology
Budgets and years are as published in Windsor’s capital improvement plan or adopted budget. Klarifi extracts the water, sewer and wastewater line items from the published document, keeps the page reference for each one, and assigns a project type from the title and description with a keyword classifier. Figures are planning budgets, not awarded contracts, and can change when a plan is re-adopted.
Documents: CIP 2023–2028 (20 line items).
Data refreshed September 11, 2026.